11.24: Two wave pulses travel to the rigqj;hyx eo4:qq ty;f6tix0 -1 mht toward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of tmq:y6ht e-i0 tq1j;x x 4yq;fohe following pictures best represents the superposition of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through the air and strikes the surface of a yh 1. v-ttziwvju6+nd4*2 hgkplastic block*gh 6n t+yvhtj1w- zdv .u4ki2. Which pair of statements correctly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward throu-qaty6y .js *rgh the point labeled B in the diagrq. t yrja*-6syam shown. The ray reaches a flat mirror placed at an angle $\Theta$ to the horizontal as shown. Which one of the locations labeled in the figure best represents the point through which the ray reflected from the mirror will pass?

  00.04: Specular reflection occurst:+ffn.gv9jv s- l6fe3w. mtq whenever light is incident on

  05.18: A student hold a hand mirror to observe the back of her head while stando2m3vl s(wyc1ing in front of and looking into a wall mirror. If she is standing 4 ft in front of the wall mirror and she holds the hand mirror 1 ft behind her head, she will see the back of her head how far behind thl2wc(y1o vsm 3e wall mirror?

  14.25: It is observed that a light ray cywsrlgq sh 3*8b )x+m,9e6xpls s:oo;hanges direction when it enters a new material. Which one of the following choices is the term best associated with thl:8eo qsxb o6;w9 g xlsp*mh)sy3s,+ris phenomenon?

  96.19: Light that has wavelength of 500 nm in air has waveleng919iis (urgxjsrqo 7)th 400 nm in a transparent material. What i x1g7iou99sr(ijq)sr s the index of refraction of the material?

  98.04: As sound travels from steel into air, boyy0 72dp)m mjsd2dm+l th its speed and its:

  00.01: As a wave moves from one medium to aboc.+hb ;gk3b second medium with a different index+3bbko gh; bc. of refraction which of the following wave properties would NEVER change?

  05.47: A sound wave generated frh*t)9qscr .9g5 y;xlkt.btnm, :bylw om a tuning fork of single frequency travels from air (with speed of sound 340 m/s) into rock (with speed of sound 1500 m/s). Which statement is true about th)t klx:yc r.59t*q w;nh9gbs.l btmy, e wavelength and frequency of the sound as it passes from air to rock?

  14.28: A waterproof speaker placed at the bottom of a swimming pool v1umvus/-ku: emits a sound wavv-/:vuukmu s 1e that travels toward the surface of the water. In the water, the sound wave has a frequency $f_{water}$, wavelength $\lambda_{water}$ , and wave speed $v_{water}$ . When the sound wave enters the air it has a frequency $f_{air}$ ,wavelength $\lambda_{air}$, and wave speed $v_{air}$ . Which one of the following relationships correctly compares the frequencies, wavelengths, and wave speeds of the waves in the air and water?

  02.33: A short burst of white light strikes a reuer p8wmvt9j/azco5sa9d + (4ctangular glass block with an angle of incidence of co j mudrz9epwstva(8+/4 a59$0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of light is directed toward a point Pfbn7 gw3n+w/19,gdtb( a ddms on a boundary as shown to the right. Which se ,( 7f9m3tbggnbsd+ nwd1 wad/gment best represents the refracted ray?

  98.17: Which diagram best reprei)2;y nvwo3h.g g 6rnesents what happens to a ray of light entering air frwnie.6 gn rhg3;y2)ovom water? Air is at the top in all diagrams.

  94.11: The critical angle of a material is the angle of incidence for which th, xf,yun0 v*g(acw*rfe angle of refraxv* (f,rac nu0wfgy,*ction is:

  95.12: The principle underlying 6y8wlu3 zd* gf5a pi5z84cgklfiber optics is:

  98.36: The critical angle in a t8:mmc;6)jy xe 0gbkn67 ugcpmransparent substance surrounded by air is $30^{\circ}$. The speed of light in
the substance (in multiples of $10^8$ m/s) is most nearly

  01.28: Light travels from material X with an index of rjbf/rivo3 oen8t+yd9 qicli4y) r8 ( /efraction of n = 1.5 to material Y with an index of refraction of n = 2.0. If the speed of light in material Y is v, wh) nio9y4y obi38c+r velj 8 di/rq(tf/at is the speed of light in material X?

  03.15: A jeweler can distinguish betwe,c-lk)1v l9w/7uydq 9gqsecdrx9* y een a diamond and a piece of glass by observing the critical angle of the light in each material. Glass with an indey )rd*q / 9luld1g,xk9seqvec w7c9 -yx of refraction of 1.52 has a critical angle of $41.1^{\circ}$ while a diamond with an index of refraction of 2.42 would have a critical angle of:

  05.26: Light shines fromy.c0r wl nt7q+(h )t*xfvl ih* air into a clear material. When the light makes an angle of incidence equal htlxc*(f .yqw rl)nt7ihv*+0to $30.0^{\circ}$, the light refracts at an angle of 1$5.0^{\circ}$. If the light is shone from an angle of incidence of $60.0^{\circ}$, what is the angle of refraction?

  95.40: A Metrologic laser is embedded in a material of index of refraction n5qoz38 aa h(ca ,jsy.n. The laser beam emer a(8sjozny,aq53.hc a ges from the material and hits a target. See the accompanying figure for the position parameters of the laser and target. The value of n is:

  95.31: A beam of light pass eadm r1xmu5i bmx tbwmj4-kx ..;5.(*fzj y2mes from medium 1 to medium 2 to medium 3 as shown in the accomp mfum.m.ix 42ya5*t15wmbx. ejd jkmz; -x(branying figure. What is true about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 t.cufjro2xox -+it ( 78gk9tpeo medium 2 to medium 3 as shown in the diagram. What may be concluded about the three ind(r iuoe9c k+t.oxg7 p2- x8tjfexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows +pe* a ,iarx+k3xb+mb9es0 ae the path that a light ray takes passing through three transparent materials. The indices of refractix9xie a kba +0rm,*s3b++ epeaon in materials 1, 2, and 3 are n1, n2, and n3, respectively. Which of the following best describes the relation between the indices of refraction?

  09.34: The diagram below shows the path taken by a monochromatic light ray tr7ia2hf bfd) ks qm(p60/iv0cgaveling through three media.2kh) 70 q(affbcsmpg 6vi0id/The symbols $v_1$,$\lambda_1$ , and $f_1$ represent the speed, wavelength, and frequency of the light in Medium 1, respectively. Which of the following relationships for the light in the three media is true?

  99.26: A beam of light i1eb kbwh pj7v ; (/6(crn1o2ly.euuytraveling in glass ($n_g$=1.5) strikes a boundary with air ($n_a$ =1.0) at point P.The angle
of incidence is $60^{\circ}$ as shown in the diagram. Which ray would best indicate the beam’s path after point P?

  04.35: A ray of light is incident on the surface of a rectangular blocsu hw4xbn2y . ip7+bh*gz0p4r 4tls p9k of glass at*biw7h9yx.0u4srn p4 pb 2gp l4zhst+ an angle of $45^{\circ}$. It refracts into the glass and then strikes the side of the block as shown in the diagram. What would be the most likely path of the light after striking the side of the glass block?

  13.27: Light of wavelength 600nm is transmitted from air into a 3ube+ -dzuc 0g6 myah*zc)i 0fpiece of glass. Which one of the labeled arrows best indicates the path of the light ray )c 0i-by0zcue3fz hm*6 + udgaafter it enters the glass?

  14.44: A ray of monochromatic light enters the right-trianguas)ww f 95x0hqlar glass as shown. The glass has an index of refraction of 2.00 and it is sur0qh59f)wsw a xrounded by air. Which one of the lettered rays shows the path of the light after it exits the glass?